Alpinestars Race v4 Fire Resistant Racing Socks - FIA 8856-2018 Vehicle Model_918 Spyder A set screw in the

A set screw in the thumb knob helps keep the unit from coming loose

consistent tightening once seated

Fits all bottom mounting Sparco seats or use in conjunction with a Sparco Side Mount bracket

It offers outstanding resistance to vapor lock

Medium Width (410-426mm seats) fits many popular seats

Alpinestars Race v4 Fire Resistant Racing Socks - FIA 8856-2018 Vehicle Model_918 Spyder A set screw in theThe Alpinestars Race v4 Socks offer excellent heat transfer protection and flat seams for comfort. THe lightweight and durable construction features a stretch feel that offers excellent comfort and mobility. The FIA 8856 2018 homologated socks fit to just below the knees.